Related Experiment Video
Updated: Aug 18, 2026

Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans
Published on: June 4, 2014
Expressing dietary values for fat-soluble vitamins: changes in concepts and terminology
Abstract:
The 9th ed. of the Recommended Dietary Allowances has abandoned the use of international units for expressing the food values for vitamins A, D, and E, and has set forth expressions based on absolute weights, including vitamin K. These changes will necessitate a revision in the manner in which both experimental and applied nutritionists deal with these vitamins. In this review, the background and rationale for these changes are presented in an effort to aid investigators in their transition to this new concept. Changes in the nomenclature of vitamin E are also explained.
Related Concept Videos
Structure of Lipids
Overview of Fatty Acid Metabolism
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
Lipid-derived Compounds in the Human Body
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin, delayed...
Fats as Energy Storage Molecules
Lipids: Dietary Sources and Requirements
Vitamins

